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Old March 19th, 2008, 04:31 PM   #21
JUSS10
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LED's rock! i work for a company in their LED R&D cell and mess around with a lot of little projects like this. looking awesome.
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Old March 19th, 2008, 04:37 PM   #22
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Yeah, I don't mass produce, so I just shoot for quality.
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Old March 25th, 2008, 05:29 AM   #23
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Do you think these get hot enough to melt epoxy? I was thinking of doing the same thing, but putting a gob of clear epoxy on the light to protect it.
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Old March 25th, 2008, 08:02 AM   #24
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Dies will get up around 80-120c, on average, depending on ambient temp. But courld see up more than that. It will discolor the epoxy if you put it over the lens.

They actually use certain epoxys (mixed with phosphors to adjust the color) over the lens on some lower power LEDs, but at high temps they will discolor.
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Old March 25th, 2008, 08:17 AM   #25
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not only will it discolor but i have had it make the epoxy just fall apart. the heat makes it very grainy and paste like. makes for a big headache when trying to fix it if anything would happen.
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Old March 25th, 2008, 09:42 AM   #26
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bummer, because That would be a lot easier and you would have a really good seal from water and debris. As for fixing them, I would just make spares for $4 each and replace them.
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Old March 25th, 2008, 10:24 AM   #27
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looks good
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Old March 26th, 2008, 08:14 AM   #28
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So these have to be powered by and AC current? How would I hook them up to a 12v DC source for trial w/o a board?
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Old March 26th, 2008, 08:39 AM   #29
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So these have to be powered by and AC current? How would I hook them up to a 12v DC source for trial w/o a board?
They don't need AC; they need DC.

Hook them up with in series with a resistor and your 12VDC source.
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Old March 26th, 2008, 08:47 PM   #30
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This might be a dumb question, but instead of making turn signal replacement bulbs (and other bulbs like that) with a ton of little LEDs on them....why not just make bigger LEDs? It would be awesome to have one LED the size of a signal bulb with proportionately more light output.
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Old March 26th, 2008, 09:54 PM   #31
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They do...you can buy replacement LED bulbs for your regular bulbs out of any 4WD catalog. I had to buy a pair so my front side turn signals would work properly with my converted front grill ones.
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Old March 27th, 2008, 05:03 AM   #32
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don't they all consist of a bunch of regular sized LEDs though?

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Old March 30th, 2008, 05:33 PM   #33
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Well 6 of the 8 are in.

Sorry this pic is blurry, I had to mess with the shutter speed to get a decent representation of the light.
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Old March 30th, 2008, 05:48 PM   #34
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Well 6 of the 8 are in.

Sorry this pic is blurry, I had to mess with the shutter speed to get a decent representation of the light.
Looks very much like mine... the problem I have is getting them placed right to put light where you really want it, in front of the front tires.....
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Old March 30th, 2008, 06:01 PM   #35
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Quote:
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don't they all consist of a bunch of regular sized LEDs though?
A few reasons:

1) 'regular' lower power LEDs can run without a fancy power supply, and not much in the way of heatsinking. Cheap, too.

2) Emission pattern. Its hard, without a lightguide, to get enough actual light output from a single, even the bright ones.

Mainly, both of those, sum up to simple economics.
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Old March 30th, 2008, 06:02 PM   #36
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Quote:
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Looks very much like mine... the problem I have is getting them placed right to put light where you really want it, in front of the front tires.....
Daryl really shouldn't have that problem.

The board that I built is capable of 9 LEDs. I know Daryl is planning on putting one on the front, but he could put two up there if he wanted to.

Here are some pictures that I took. (still only 5 of 9 LEDs in)

(Again, sorry for the blurriness...)









Also, I tried taking a video of the strobe with my camera, but it couldn't keep up. If anyone wants one that badly, I suppose we could slow the strobe down for a video.
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Old March 30th, 2008, 06:46 PM   #37
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Just commenting on the shadow pattern in front of the front wheels. I have the same issue on my truck. At least from the pics, thats how it looks. I'd get one right up behind t he edge of that tube fender.
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Old March 30th, 2008, 08:05 PM   #38
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Just commenting on the shadow pattern in front of the front wheels. I have the same issue on my truck. At least from the pics, thats how it looks. I'd get one right up behind t he edge of that tube fender.
Yeah, I figured that was what you were getting at. That is the beauty of Daryl having the 9 LED set-up. He can afford to put one in front of each front tire.

I can't wait for some trail shots/reviews!
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Old March 31st, 2008, 09:21 PM   #39
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Any of you LED experts know about these. 180 lumens at 700mA and 3.85 volts sounds pretty good for $8

http://www.luxeonstar.com/item.php?i...LXML-PWC1-0100
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Old March 31st, 2008, 09:26 PM   #40
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Newbe ? What is a rock light exactly??
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